142 GLOSSARY. 



FOOT- PADS, the prominences on the tread of the foot which come 



in contact with the ground. 

 FORAMEN, a hole or perforation. 

 FOSSA, a pit or depression. 

 FRONTAL SINUS, the cavity in the fore part of the frontal bone 



in the skull. 

 FRONTALS, the bones above the orbito-sphenoids closing in the 



cerebral cavity in front and above. 

 FRUGIVOROUS, feeding on fruit. 

 FUSIFORM, spindle-shaped. 

 FURCATE, divided into two branches. 

 GLENOID FOSSA, the concave under surface of the squamosal 



in which the condyle of the lower jaw articulates ; also the 



articular surface of the scapula. 



GLOSSOHYAL, the median process of the basihyal. 

 H/EMAL, pertaining to the blood. 

 HABITAT, the natural place of permanent abode. 

 HALLUX, the great toe, the innermost of the five digits of the foot, 



corresponding to the pollex in the hand. 

 HETERODONT, having teeth of different characters. 

 HIP GIRDLE, the pelvic girdle formed of the two innominate bones, 



or their separate components, carrying the hind limbs. 

 HUMERUS, the bone of the upper arm. 

 HYOID, pertaining to the tongue and neck ; the bone supporting 



the tongue. 

 HYOMANDIBULAR, the ossified upper portion of the hyoid bone 



in fishes. 

 HYPAPOPHYSIS, the central process projecting downwards from 



the ventral surface of the vertebra. 



HYPOCONE, the fourth primary cusp of an upper tooth. 

 HYPOCONID, the fourth primary cusp of a lower tooth. 

 H YPSODONT, having the crown of the tooth long and the root short. 

 ILIUM, the haunch-bone, the bone in the hip girdle which cor- 

 responds to the scapula in the shoulder girdle. 

 IMBRICATED, overlapping. 



INCISORS, the front teeth in the mammalian jaw. 

 INCUS, the middle bone of the ear. 

 INDEX, the first finger. 

 INGUINAL, pertaining to the groin. 



INNOMINATE bones, the two halves of the hip girdle each con- 

 sisting of the ilium, pubis, and ischium. 

 INTERCLAVICLE, the lower prolongation of the clavicle, as in 



the monotremes. 



INTERMAXILLA, the same as the premaxilla. 

 INTERMEDIUM, the wrist bone in the angle between the radius 



and ulna ; also one of the constituent bones of the 



astragalus. 

 INTERPARIETAL, the apparent anterior prolongation of the 



upper end of the supra-occipital. 

 INTERVENTRALIA, the vertebral elements forming the centrum 



in reptiles. 

 ISCHIUM, the bone in the hip girdle on which we sit. It 



corresponds to the coracoid in the shoulder girdle. 



